I have an older computer with a SATA-I connection. My hard drive crashed and I need to buy a new hard drive. Will I run into problems if I connect a SATA-II drive to my computer?

1 Answer 1


Yes, SATA-II is backwards-compatible. You'll only be able to use SATA-I bandwidth (150 MB/s), but since that is well above what normal hard drives deliver, that shouldn't be a problem.

  • that's what i thought too, but i've got recent Seagate SATA-II drives that aren't playing nice with my onboard SATA-I controller. no jumpers to force it either. could be a bios config issue, i gave up and put them on an internal sataII controller. Oct 7, 2009 at 1:37
  • I finally got everything connected up about a week ago and it worked like a champ, no problems. Nov 15, 2009 at 19:08
  • I'm not so sure about the "(150 MB/s) is well above what normal hard drives deliver", actually. I just checked the throughput on my most recent ZFS scrub (which is pretty a random-I/O intensive operation) on the large single-disk spinning-platter pool, and that shows ~124 MB/s in verification data throughput. (1.47TB verified as correct on disk in 3 hours 27 minutes.) If that disk was using SATA-I, that wouldn't leave much margin for lower-level stuff, let alone that ZFS scrubbing is an online operation. This doesn't invalidate the answer, though.
    – user
    Dec 14, 2013 at 11:46

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .